Description

The objective of this technique is to provide a way for people who have
hearing impairments or otherwise have trouble hearing the dialogue in
synchronized media material to be able to view the material and see the dialogue and
sounds - without requiring people who are not deaf to watch the captions.
With this technique all of the dialogue and important sounds are embedded as
text in a fashion that causes the text not to be visible unless the user
requests it. As a result they are visible only when needed. This requires
special support for captioning in the user agent.

NOTE: Captions should not be confused with subtitles. Subtitles provide text
of only the dialogue and do not include important sounds.

Examples

Example 1

Example 1: In order to ensure that users who are deaf can use their
interactive educational materials, the college provides captions and
instructions for turning on captions for all of their audio
interactive educational programs.

Example 2: The online movies at a media outlet all include
captions and are provided in a format that allows embedding of
closed captions.

Example 3: Special caption files including synchronization
information are provided for an existing movie. Players are
available that can play the captions in a separate window on screen,
synchronized with the movie window.

Example 4: A video of a local news event has captions provided that
can be played over the video or in a separate window depending on
the player used.

Related Techniques

Tests

Procedure

Turn on the closed caption feature of the media player

View the synchronized media content

Check that captions (of all dialogue and important sounds) are
visible

Expected Results

#3 is true

If this is a sufficient technique for a success criterion, failing this test procedure does not necessarily mean that the success criterion has not been satisfied in some other way, only that this technique has not been successfully implemented and can not be used to claim conformance.